Coal-gas carburetor



Mar. 6, 1923; 1,447,737

7 f H. SWARTZ COAL GAS CARBURETOR- Filed Feb. 5, 1921 INVENTOR; HENRY SWARTZ,

s of the United States.

To all whom it may concern:

Patented Mar. 6, 1923. l

mrsu s'rrss HENRY SWARTZ, OF PHILADELPHIA, PENNSYLVANIA.

COAL-GAS CARBURETOR.

Application filed. February 3, 1921. Serial No. 442,218.

Be it'known that I, HENRY zen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain new and useful Improvement in Coal- Gras Carburetors, whereof the following is a specification, reference being had to the accompanyin'g drawing.

ment for an ordinary house heating fur nace. However, it is to be understood that it may be employed in conjunction with any type of furnace.

As'hereinafter "described; my improved device includes a tubular air conduit having means to rigidly secure it in anopening extending through the door or wall of a furnace; said conduit carrying, at its inner end, a mixing chamber with air inlets and outlets and having, at its outer end, means adapted to afiord a permanent air inlet portof predetermined size and valvular means whereby additional air inlet ports may be opened and closed.

My invention includes the various novel features of construction and arrangement hereinafter more definitely specified. However, the specific details of construction and arrangement of the air inlet valvular means aforesaid are claimed in my copending application Serial No. 523,152 filed December 17 1921, for Letters Patent In said drawing; Fig. I is a plan view of a carburetor embodying my invention.

Fig. II is an outer end elevation ofjsaid carburetor.

Fig. III is a vertical sectional view of said carburetor taken on the line III, III in Fig. I.

Fig. IV is a transverse vertical sectional view of the mixing chamber shown in Figs. I and III, taken on the line IV, IV in Fig. III.

In said figures; 1 is a tubular air conduit (conveniently formed of a piece of onequarter inch gas pipe) fitted through the opening 2 in the door or wall 30f a furnace SwARrz, a citi-- inclosure, and carrying, at its inner end, themixing chamber 5, which is rlgidly con- .nected with said conduit 1 by the screw thread 6 and jam nut 7. Said chamber 5 is conveniently formed of a single casting of iron alloyed with silicon and manganese in such' proportions as to resist oxidation. Said chamber 5 overhangs the fire 8 as indicated in, Fig. III, soas to come within the primary gaseous products of combustion 9 arising from said fire.v Said chamber 5 has, at its bottom, a series of nozzles 10, which, as shown in Fig. IV, have respective cylindrical vents 11 outwardly flared at their outer ends. Saidchamber 5 also has a series of vents 1 at its inner edge and a series of vents 15 extending obliquely upward with respect to said vents l1 and 14:.

I also find it convenient to provide said chamber 5 with the baffle plate or rib 17' extending transversely in opposition to the inner end of theair inlet conduit 1 so as to distribute the incoming air throughout said chamber 5.

It is to be understood that the heat of the fire 8 causes circulation ofair through said vents 11, 14 and 15, inducing the flow of air inwardly through said conduit 1. I prefer to provide said conduit with the inlet port 19, (conveniently formed by drilling said conduit 1) so as to draw back into the furnace any unconsumed gaseous products from said fire 8 which otherwise might tend to escape at the crevices around the door 3, and return the same through the vents aforesaid. However, I provide for a continuous supply of fresh air from the outer atmosphere, as follows:

I provide the outer end therewith by the screw thread said con duit 1 and casing 21 being rigidly connected with said door or wall 3 by the jam nut.

inlet port 30 of such size as is predetermined to be best suited for the type of furnace in connection with which the carburetor is of said conduit 1' with the valve caslng 21 which. is engaged used, and maybe simply a hole drilled through said boss 27.

However, I also prefer to provide. said valve plate 28 with auxiliary ports 32, as shown in Fig. II, which are closed when said valve is in the position indicated in the 7 drawing but which may be partially or en tirely opened by turningsaid valve upon'its axial boss 27, and the lugs 34 are provided to conveniently effect such rotation manually.

ltimay be observed that said ports 32 are of determine the air supply, by adjustment'of' said plate 28 to vary the size of the air inlets in accordance with the velocity of the air induced by the draft ofthe furnace to Which m improved carburetor is attached.

However, it. is to be understoodthat I do not desire to limit myself to the'precise details of construction and arrangement herein set forth, as it is obvious that various modifications may be made therein without departing from the essential features of my invention, as'defined in the appended claims;

I claim: a i i 1-. In a coal gas carburetor; the combina tion with a tubular air conduit having: a screw thread at each end thereof; of means .arranged to rigidly connect said conduit with an opening in a furnace inclosure, including a' am nut; a nnxlng chamber at the inner end of said conduit, comprising a single hollow casting of oxygen resisting metal having a screw thread fitted toysaid conduit; an internal baffle elementin opposition to said conduit, a series of projecting nozzles with vents extending from the bottom of said chamber and outwardly'flared at their outer ends, a second series of vents above said first series and at the inner edge of said chamber, anda thirdseries of'vents above said second series and extending obliquely with reference to said first and second series ofvents; and means attached to said screw thread at the outer' cnd ofsaid conduit,'arranged to control the admission of air to said conduit.

,2. In a coal gas carburetor; the combination with a tubular air'condu txhaving a screw thread at eachend thereof; of'means arranged to detachably rigidly connect said conduit with an opening in a furnace inclosure; a mixing chamber at the inner end of said conduit, comprising a casting of oxygen resisting metal having a screw thread fitted to said conduit; an internal baffle element in opposition to said conduit, a series of vents extending through the bottom of saidchamber andoutwardlyflared at their outer ends, a second series of vents above said first series and at the inner edge of said chamber, and a third series of vents above said second'series and extendingobliquely with reference to said first and second series of vents; and meansattached atthe outer end of said conduit arranged to control the admission of air to said conduit.

3. In a coal gas carburetor; the combination with a tubular air conduit; of means arranged to rigidly connect said conduit with an opening in a furnace inclosure; a mixing chamber at the inner endof said conduit, comprising a single hollow casting of oxygen resistingmetal having a screw thread fitted to said conduit; a series of proecting nozzles with vents extending from the bottom of-said chamber, alsecond series of vents above said first series and at the inner edge of said chamber and a third series of vents above said second-series and extending obliquely with reference to said first and second series of vents; and means attached at the outer end of said conduit arranged-t0 control the admission .of air to said'conduit.

- 4. In a coal gas carburetor;the combination with atubular airconduityof means arranged to rigidly connect said conduit with an opening; in a furnace inclosure; a mixing chamber at the inner end of said conduit, comprising a single hollow casting of metal having ascrew thread fitted to said conduit; a series of pro ectmg nozzles with vents extending from the bottom of said chamber, and a second seriesfofv'ents above said series and at the inneredge of said chamber. v t d i In testimony whereof, I have hereunto signed my name at Philadelphia, lennsyL ,vania, this twenty-seventh day of January,

HENRY S'YVARTZ. Witnesses; f

A.RTHUR E. PAIGE, '3 CAROLYN E. REUTER,' i V i i I] 

